Lead Dotnet Developer

Job Title: Senior C# / .NET Developer – Financial Services (Risk / Securities Lending)

Location: London (Hybrid - 3days/week)

Duration: 6 Months contract

Rates: 59.98 GBP/Hr on PAYE

Job Description

Role Overview

• We are seeking an experienced C# / .NET Developer to join a technology team supporting critical Financial Services platforms, with a strong focus on Risk Management and/or Securities Lending domains.
• The role involves designing, building, and supporting high performance systems used for risk calculations and trading/financing workflows.
• You will work closely with quants, risk managers, business analysts, and product owners to deliver robust, scalable solutions in a regulated environment.

Key Responsibilities

• Design, develop, and maintain C# / .NET applications supporting Risk or Securities Lending platforms
• Build and consume RESTful APIs to integrate with upstream/downstream systems
• Implement scalable, testable, and maintainable object oriented code following best practices
• Contribute to risk workflows including exposure calculations, limits, and reporting
• Work with large data sets and high throughput systems typical of financial services
• Participate in code reviews, architectural discussions, and technical design sessions
• Collaborate with cross functional teams (Risk, Front Office, Operations, Compliance)
• Support production systems and assist with incident analysis and remediation

Required Skills & Experience

Core Technical Skills

• Strong hands-on experience with C# and .NET (.NET Core / .NET)
• Excellent Object-Oriented Programming (OOP) skills and design principles
• Proven experience designing and implementing APIs (REST / JSON)
• Solid understanding of application architecture, performance, and scalability
• Experience with SQL databases (e.g. SQL Server)
• Familiarity with unit testing, integration testing, and CI/CD pipelines

Financial Services Domain Knowledge (Essential)

• Experience working in Financial Services technology environments
• Strong domain knowledge in at least one of:
• o Risk Management
• o Securities Lending / Prime Brokerage
• o Collateral, Margin, or Financing platforms

Risk & Regulatory Experience (Highly Beneficial)

• Exposure to risk and regulatory methodologies such as:
• o RWA (Risk Weighted Assets)
• o CCAR
• o Basel III / Basel IV frameworks
• Understanding of credit risk, counterparty exposure, or capital calculations is a strong advantage